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UNITED" STATES PATENT 'OFFICE;

.rSIMEON GIL," or noRDEAux, emotion, ASSlGNOR T THEJSOCIETE cAsrANon; MENENDEZ & GIL, OF :PARIS, FRANCE.

Poms.

SPECIFICATION forming part of Letters Patent No. 356,997 dated February 1, 1887. Application filed September 4. 1386. Serial No. 212,701. (No model.) latrntel in France February 17-, ,188G No. 174.133. f

To all whomit may concern: 3

Be it known that I, SIMnoN GIL, a citizen of theFrench Republic, residing in Bordeaux, Department of Gironde', France, have; in

5 vented certain new and useful Improvements in Pumps-of which the'following is a specification.

- This invention relates to pumps wherei'n a the making of a tight joint around the dia-- phragm. This'diaphragmis clamped betweenthe edges of'the two opposite sh'ells'orparts of 3 the pump-chamber, which arefpreferably of approximately conical form, and the center;

of the diaphragmis connected to apiston-rod, by the'reciprocation of which the diaphragm is displaced to one side orthe other. Avalve may be placed in the center of the diaphragm.

The accompanying drawings show-iny in 0 ve ntion'as'appliedto several different kinds.-

of pumps.

Figure-l is a side'elevation, partly in transverse section, of my improved diaphragm'or:

- flexible piston in; its preferred construction.

Fig; 2 is a vertical section of a double-actingforce-pump-constructed according to my in-' vention, and Fig.3isa fr nt elcvationthereof. i Fig. 4 i'sa view similar tov Fig; 1, showing a modified construction-of diaphragm. Fig. 5

.,-4o is a side elevation, partly'in vertical section,

of a double-acting force-pump fitted with the diaphragm shown in Fig. 4. Fig. 6is a side elevation, partly in section, of a fire-pump having two chambers, each provided with a single acting diaphragm constructed with a valve at its ccnter;' and Fig. 7,is an: elevation,

. clamping thediaphragm B between'them. The

shells are, by preference, of conical form,'or approximately so. j i O is the standard or base of the pump,whicli or be separate therefrom.

D is the inlet, and E the discharge. Tis the pistonrod, and L the operatinglever'.

VV are the valves.

may be in one piece .with one of the shells A, I

Referring especially to Fig.1,the diaphragm B is made of india-rubber, with concentric or v annular corrugations'or ribs. Its center is preferably ina different plane'from its edges, thus giving it a conical form, or approximatelyso. When pressed out of this shape,it tends somewhat forcibly t.o' return thereto. Embedded in the rubber are one, two, three,' or more stifi'eningrings b, b, of metal or-other suitable material. Around these rings the rubber is thickened or ribbed, and-between them it is comparatively thin and flexible. T'The rubber is toughened by one or more layers of strong K clothor other woven or textile fabric, a a.

Two such layers are" shown embedded iuthe rubber nea'r its oppositesurfaces. They may, however, be upon the'exterior of the rubber, and they may be one or more in number.

The margin or circumference of the diaphragm is provided with a ring, 6', embedded v.in it, and around this ring the rubberisthick cned or ribbed. The ring is preferably of' metal, in which case it not only thickens the rubber, but also forms a stifl'ening for the circumference of the diaphragm.

*retainingj of the latter in place when clamped between the two shells A A Of the pump-chamber. These shells have grooves or annular Thethickening or enlargement of the rubber near the edge of the diaphragm facilitates the indentations extending around their flanged.

edges,'aud coinciding with the ribs on the diaphragm occasioned by the ring b, so that the edge of the diaphragm cannot be pulled .out

- from between the shells A A by any pressure that may be brought to bear on the diaphragm passed through perforated ears e 0, formed onback and forth the diaphragm is displaced at chamber to the other, thus alternately expand= ing and contracting the spaces or divisions of phragm to bend over, as shown in Fig. 5. Theby collars e e, pressed together by wedges h h.

. through the diaphragm. On one side is screwed Q I rod, T,

rod.

drawings, and require-no description.

v pumps.

7 der heavy pressures.

the shells. The soft edge of the diaphragm forms a pad or cushion for making a tight joint between the flanges of the shells A A. In the pumps shown in Figs. 2, 3, and 6 one of the shells A has a flange, d, which extends'over and incloses the edge of the diaphragm, thus concealing it.

The center of the diaphragm is pierced with a hole which admits through it the piston-rod T, as shownin Figs. 2 and 5, or with a larger hole 'in which is set the seat of one of the valves, as shown in Figs. 6 and 7. In Fig. 2

the piston-rod has a flange, e, fixed on it, which comes against one side of the diaphragm, and against the other side is placed a washer, f,

which is forced toward the flange e by a nut,g,

thus clamping the diaphragm firmly on the piston-rod. As the piston-rod is reciprocated its center and moved from one side of the the 'chamberon either side of it, as is well understood with reference to diaphragm- Pumps of this character have the advantage of absence of friction, and since there is no movement of a;piston in a cylinder there is no necessity of the pump-chamber being turned or smoothed interiorly. For the pumping of acids the surface of this chamber may be enameled. The diaphragm shown in Fig. 'difiersfrom that already described in having a flat edgethat is, the ring or cushion bis omitted. Fig. 5 shows a pump constructed with this diaphragm, which is clamped at its-edges between the two shells A A by means of bolts or screws, which pass throughthe flanges of the shells, and also through the edge of the diaphragm. It is best when using this kind of diaphragmto make the shells A A with an easily-rounded curve for the outervmoving part of the diapiston-rod T is here fastened to the diaphragm In Figs. 6 and 7 the diaphragm is shown with one of the valves V carried in its center.

The seat of this valve is formed at one end of a short tubeflr, which is placed in the hole a ring, m, forming part of an open spider, n, to which the end of the-piston-rodiT is screwed. On the other side is placed a washer, c','and against it is screwed a' ring, j, forming part of a spider, Z, and to this spider ,is fixed a guideforming a continuation of the piston- The mechanical details of the several pumps shown will be readily understood from the Pumps constructed according to my invention may be worked by hand or power, maybe arranged at any depth; and, by virtue of my construction of the diaphragm, may'work un- My pumps may be applied either as suction or force pumps, and for the pumping of corrosive chemicals and gritty water, for the forcing of air, and for many different purposes.

I am aware that diaphragms of rigid mate-- rialsuch as metal, celluloid, &c.--have been made with parallel concentric annular crimps or corrugations, and that such diaphragms have-had their edges annularly crimped or corrugated for engagement with the shells between which theyare clamped.

I am also aware that a diaphragm-of soft rubber has had its edge very slightly thickened to facilitate its being clamped between the flanges of the shells; but I am not aware that a rubber diaphragm has been made with an; nularly-thickeued ribs, so that its concentric portions are alternately thick or rigid and thin or flexible; nor am I aware that a rubber diaphragm has been formed with a ribbed or thickened margin, internally stiflened and forming an integral cushion for engagement with coinciding grooves in the flanges of the shells between which it is clamped.

I claim as my inventiou- I I 1. A pump diaphragm of india rubber, adapted to be clamped at its center and edges,

and constructed in its concentric intervening portion of alternate annular stiffening-ribs and flexible portions between said r'rbs,.sub s tantially as described.

2. A pump-diaphragm of india-rubber, constructed with a concentric stiffening-ring embedded in it, substantially as'described.

3. A pump-diaphragm of india-rubber, constructed with a middle layer of rubber rev enforced by two layers of tough cloth or similar textile fabric on its oppositesides, with a stiflening-ring embedded in said middle layer, and the rubber and cloth ribbed around said substantially as described.

4. A pump diaphragm of india rubber, constructed with an annularly-ribbed and internally-stifieued margin, forming a thickened cushion for engagement between the fasteningflanges, substantially as described.

5. A pump -diaphragm of india rubber, constructed with a ring embedded in it close to its margin and the rubber ribbed or thickened around said ring, substantially as described.v

ring, whereby the same is cushioned therein,"

;6. A pump-diaphragm of resilient indiarubber, constructed of approximately .conical form and with concentric annular thickeningribs and intervening portionsof greater flexibility, substantially as described, whereby when the middle of the diaphragm is forced to one'si'de it tends 'to return to the other.

-In witness whereof I' have hereunto signed my namerin the presence of .two subscribing witnesses.

'Witnesses RAMON MENENDEZ, AMAND- BITTER. 1

- s'IMEoN GIL. 

